Answer / nitin khatana

because the line in traction system are very long distances so there is voltage drop across line to boost up this voltage we connect an autotransformer which is placed at some distances from other for compensate this voltage drop we used transformer.

Answer / shripad

Booster transformers are used in electric railway AC catenary feeders to collect the return current from the rails and the earth to the return conductor. ... Booster transformers are used to eliminate the stray currents and the disturbances, obliging the return current to flow to the return conductor.

What will be the effect of in HT XLPE 220 KV cable when one side of the Armour/cable ends are not grounded. Will there is difference between 3-phase voltages? like: if A. Both End of Cable grounded Phase Voltages:- V1=219 KV, v2=220 Kv, v3=220 KV. B. One End is grounded other is not: than Impact on Phase Voltages:- V1= KV, v2= Kv, v3= KV. Remain same or unchanged??

3 Answers   Jamshoro,

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What will happen if we on 200kvr capacitor bank(11kv in bus)If there is low load on transformer (1.5 mva 33/11 kv)

0 Answers  

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hi frnds...pls send me aptransco previous papers .....pls..pls,,,(madhar.rocking@gmail.com)and suggest me some websites

0 Answers  

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How much area is covered by a single lightning arrestor to protect object from lightning strokes ?

1 Answers  

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phase colour is indicated by R Y B (red yellow blue) but in transformer i have seen U V W instead of (R Y B) have any meaning of this

3 Answers   Areva, Kim Yew,

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Is there any difference between circuit breakers and isolators

7 Answers  

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Saving in copper achieved by converting a 2 winding transformer in to an auto transformer is determined by A voltage transformation ratio B load on secondary C quality of core material D size of transformer core

0 Answers  

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How do we calculate over and under frequency tolerance from generator data?

0 Answers   DPS,

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What is the meaning of ST and HT in electrical transmission and what are thier range.

6 Answers  

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What is a soft start?

2 Answers   Bhel, jlpl,

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High Voltage out door substation-annual maintenance, things to be considered

1 Answers  

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in 3 phase (4 wire) star connection - is current pass through neutral??

7 Answers  

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